Acta Scientiarum Polonorum

Abstract: Possibility analysis of cement partial replacement in concrete by mineral waste materials (fly ash, blast-furnace slag) indicate, that it is a profitable solution from technical, economical and environmental point of view. Though it causes, that strength increase is slower and other parameters (water tightness, frost resistance etc.) are achieved later, but strength after longer curing time is greater, then for concretes containing only portland cement, and other parameters are the same or even better. Guarantee of suitable technological regime allows to use concretes with puzzolan mineral waste materials not only in hydroengineering but in civil engineering, too, when one take into consideration, that full strength is not necessary in early stages of construction.